Nov 29, 2012 11:30am PST
, its elevation in the andes gives it a mild climate. and you have aibrantery and somtourist economy.ings on the surrounding hillsides, adequate rainfall and fertile volcanic soils sustain agriculture. but the same natural forces that sustain the economy are also a source of danger. hoping to avoid a tragedy, geographer patty mothes maps and monitors several volcanoes for ecuador's geophysical institute, inclu tungurahua. she is looking for any changes that might signal an eruption. moes and one of these ways thate dohat is to put a prism that's highly reflective, or a number of prisms up on the flanks of the volcano, and then, shooting with this very high-powered laser beam... narrator: the beams reflect off the prisms and back to patty's measuring device. it can detsubthangesin t shap, changes that may forecast an eruption and save lives. their concern is based on history. inside a church, a mural recalls a deadly eruption in 1773. it happened again in 1886 and 1918. so why do people live in such a dangerous place? some people simply cannot afford to move, due to limited economic means.
Nov 29, 2012 11:00am PST
and economy change to encourage family planning? aturrent rates will they ha access to birth control? the countrs population willow double in just 24 yea, compared with 120 years for the u.s. economics, religion and the ck of birth control mean that fertility rates remain economics, religion as high as they have been for centuries. at the other end of life, however, something has changed thsalu-aspanish foal. local clinics likeshave gre and keptopulatiohigh. for geographers like george lovell e goodews is tempe byace ground. sos he ponde outlook for doña magdalena's he can only hope for a change in the balance of people to the land that supports them. the inequitiesesult from three cycles of conquest, lasting over 500 years. as maya population continues to grow, a ck of nd reforjust sures greasoci ueaval lasting over 500 years. in guatemala. captioned by media access group at wgbh access.wgbh.org